# crash: checkpointing while file server burps

Amy Bruckman (asb@media.mit.edu)
Tue, 30 Jul 1996 08:55:37 PDT

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    This isn't a bug--it's more of an un-robust response to a network problem.

    MediaMOO was in the middle of checkpointing when NSF lost contact with our
    file server for a few minutes.  This caused a panic.  No panic dump was made.
    We are running LambdaMOO 1.8.0p5 (unmodified) on a Sun Sparcstation/ipc
    running SunOs 4.1.4.  Here's the output from the core file:

    microworld:~MediaMOO/db% dbx moo core
    Reading symbolic information...
    Read 25232 symbols
    warning: core file read error: address not in data space
    program terminated by signal ABRT (abort)
    (dbx) where
    warning: core file read error: address not in data space
    kill() at 0xf775f040
    abort_server(), line 196 in "code/MOO-1.8.0p5/server.c"
    panic(), line 207 in "code/MOO-1.8.0p5/server.c"
    panic_signal(), line 254 in "code/MOO-1.8.0p5/server.c"
    _sigtramp() at 0xf7732c4c
    enqueue_output(), line 462 in "code/MOO-1.8.0p5/net_multi.c"
    network_send_line(), line 539 in "code/MOO-1.8.0p5/net_multi.c"
    send_shutdown_message(), line 175 in "code/MOO-1.8.0p5/server.c"
    panic(), line 220 in "code/MOO-1.8.0p5/server.c"
    panic_signal(), line 254 in "code/MOO-1.8.0p5/server.c"
    _sigtramp() at 0xf7732c4c
    libc_xstr() at 0xf77e1c20
    libc_xstr() at 0xf77e007c
    etext() at 0x4e07c

    The partial checkpoint has a time of 11:12.  This is from /var/adm/messages:

    Jul 30 11:07:19 microworld vmunix: NFS write failed for server mc: RPC: Timed o
    Jul 30 11:07:19 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 51ff0100 12800000 c000000 2000000 1800000
    Jul 30 11:07:19 microworld vmunix: NFS write failed for server mc: RPC: Timed o
    Jul 30 11:07:19 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 51ff0100 12800000 c000000 2000000 1800000
    Jul 30 11:07:19 microworld vmunix: NFS write failed for server mc: RPC: Timed o-t
    Jul 30 11:07:19 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 51ff0100 12800000 c000000 2000000 1800000
    Jul 30 11:07:19 microworld vmunix: NFS write failed for server mc: RPC: Timed o
    Jul 30 11:07:19 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 51ff0100 12800000 c000000 2000000 1800000
    Jul 30 11:07:19 microworld vmunix: NFS write failed for server mc: RPC: Timed o
    Jul 30 11:07:19 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 51ff0100 12800000 c000000 2000000 1800000
    Jul 30 11:07:39 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:08:01 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:08:12 microworld vmunix: NFS write failed for server mc: RPC: Timed o
    Jul 30 11:08:12 microworld vmunix: NFS write error 60 on host mc fh ab09a64a a00000 c000000 dbb80000 20800000 c000000 2000000 1800000
    Jul 30 11:08:22 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:08:43 microworld vmunix: NFS read failed for server mc: RPC: Timed ouJul 30 11:09:04 microworld vmunix: NFS getattr failed for server mc: RPC: Timed out
    Jul 30 11:09:04 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:09:24 microworld vmunix: NFS read failed for server mc: RPC: Timed ouJul 30 11:09:25 microworld vmunix: NFS getattr failed for server mc: RPC: Timed out
    Jul 30 11:10:06 microworld last message repeated 3 times
    Jul 30 11:10:06 microworld vmunix: NFS create failed for server mc: RPC: Timed ut
    Jul 30 11:10:27 microworld vmunix: NFS create failed for server mc: RPC: Timed ut
    Jul 30 11:10:27 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:10:47 microworld vmunix: NFS getattr failed for server mc: RPC: Timedout
    Jul 30 11:11:08 microworld vmunix: NFS read failed for server mc: RPC: Timed ouJul 30 11:11:28 microworld vmunix: NFS getattr failed for server mc: RPC: Timed out

    -- Amy